Hallo,
Het door jou genoemde IC heeft een totaal andere functie:
CS2842A, CS3842A,
CS2843A, CS3843A
Line Current Mode
PWM Control Circuit with
Undervoltage Lockout
The CS284XA, CS384XA provides all the necessary features to
implement off-line fixed frequency current-mode control with a
minimum number of external components.
The CS384XA family incorporates a new precision
temperature-controlled oscillator with an internally trimmed
discharge current to minimize variations in frequency. A precision
duty-cycle clamp eliminates the need for an external oscillator when a
50% duty-cycle is used. Duty-cycles greater than 50% are also
possible. On board logic ensures that VREF is stabilized before the
output stage is enabled. Ion implant resistors provide tighter control of
undervoltage lockout.
Other features include low startup current, pulse-by-pulse current
limiting, and a high-current totem pole output for driving capacitive
loads, such as the gate of power MOSFET. The output is LOW in the
off state, consistent with N-channel devices.
The CS384XA series of current-mode control ICs are available in
8 and14 lead packages for surface mount (SO) applications as well as
8 lead PDIP packages.
Zoek het datasheet maar op bij ICMaster.
http://www.icmaster.com/
Groeten,
Bertus
[Bericht gewijzigd door bertusvz op 7 augustus 2008 21:19:30]
